godot/scene/main/resource_preloader.cpp

/*************************************************************************/
/*  resource_preloader.cpp                                               */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
/*                      https://godotengine.org                          */
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/* Copyright (c) 2007-2022 Juan Linietsky, Ariel Manzur.                 */
/* Copyright (c) 2014-2022 Godot Engine contributors (cf. AUTHORS.md).   */
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/* distribute, sublicense, and/or sell copies of the Software, and to    */
/* permit persons to whom the Software is furnished to do so, subject to */
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/* The above copyright notice and this permission notice shall be        */
/* included in all copies or substantial portions of the Software.       */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
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/*************************************************************************/

#include "resource_preloader.h"

void ResourcePreloader::_set_resources(const Array &p_data) {
	resources.clear();

	ERR_FAIL_COND(p_data.size() != 2);
	PoolVector<String> names = p_data[0];
	Array resdata = p_data[1];

	ERR_FAIL_COND(names.size() != resdata.size());

	for (int i = 0; i < resdata.size(); i++) {
		String name = names[i];
		RES resource = resdata[i];
		ERR_CONTINUE(!resource.is_valid());
		resources[name] = resource;

		//add_resource(name,resource);
	}
}

Array ResourcePreloader::_get_resources() const {
	PoolVector<String> names;
	Array arr;
	arr.resize(resources.size());
	names.resize(resources.size());

	Set<String> sorted_names;

	for (Map<StringName, RES>::Element *E = resources.front(); E; E = E->next()) {
		sorted_names.insert(E->key());
	}

	int i = 0;
	for (Set<String>::Element *E = sorted_names.front(); E; E = E->next()) {
		names.set(i, E->get());
		arr[i] = resources[E->get()];
		i++;
	}

	Array res;
	res.push_back(names);
	res.push_back(arr);
	return res;
}

void ResourcePreloader::add_resource(const StringName &p_name, const RES &p_resource) {
	ERR_FAIL_COND(p_resource.is_null());
	if (resources.has(p_name)) {
		StringName new_name;
		int idx = 2;

		while (true) {
			new_name = p_name.operator String() + " " + itos(idx);
			if (resources.has(new_name)) {
				idx++;
				continue;
			}

			break;
		}

		add_resource(new_name, p_resource);
	} else {
		resources[p_name] = p_resource;
	}
}

void ResourcePreloader::remove_resource(const StringName &p_name) {
	ERR_FAIL_COND(!resources.has(p_name));
	resources.erase(p_name);
}
void ResourcePreloader::rename_resource(const StringName &p_from_name, const StringName &p_to_name) {
	ERR_FAIL_COND(!resources.has(p_from_name));

	RES res = resources[p_from_name];

	resources.erase(p_from_name);
	add_resource(p_to_name, res);
}

bool ResourcePreloader::has_resource(const StringName &p_name) const {
	return resources.has(p_name);
}
RES ResourcePreloader::get_resource(const StringName &p_name) const {
	ERR_FAIL_COND_V(!resources.has(p_name), RES());
	return resources[p_name];
}

PoolVector<String> ResourcePreloader::_get_resource_list() const {
	PoolVector<String> res;
	res.resize(resources.size());
	int i = 0;
	for (Map<StringName, RES>::Element *E = resources.front(); E; E = E->next(), i++) {
		res.set(i, E->key());
	}

	return res;
}

void ResourcePreloader::get_resource_list(List<StringName> *p_list) {
	for (Map<StringName, RES>::Element *E = resources.front(); E; E = E->next()) {
		p_list->push_back(E->key());
	}
}

void ResourcePreloader::_bind_methods() {
	ClassDB::bind_method(D_METHOD("_set_resources"), &ResourcePreloader::_set_resources);
	ClassDB::bind_method(D_METHOD("_get_resources"), &ResourcePreloader::_get_resources);

	ClassDB::bind_method(D_METHOD("add_resource", "name", "resource"), &ResourcePreloader::add_resource);
	ClassDB::bind_method(D_METHOD("remove_resource", "name"), &ResourcePreloader::remove_resource);
	ClassDB::bind_method(D_METHOD("rename_resource", "name", "newname"), &ResourcePreloader::rename_resource);
	ClassDB::bind_method(D_METHOD("has_resource", "name"), &ResourcePreloader::has_resource);
	ClassDB::bind_method(D_METHOD("get_resource", "name"), &ResourcePreloader::get_resource);
	ClassDB::bind_method(D_METHOD("get_resource_list"), &ResourcePreloader::_get_resource_list);

	ADD_PROPERTY(PropertyInfo(Variant::ARRAY, "resources", PROPERTY_HINT_NONE, "", PROPERTY_USAGE_NOEDITOR | PROPERTY_USAGE_INTERNAL), "_set_resources", "_get_resources");
}

ResourcePreloader::ResourcePreloader() {
}